I love these kind of things, for years I want to learn decompile old games....but equal other things I do not know what it is the first steps or tools.
I’m happy to talk about the tools and process or anything anyone else in chat wants to know about. I have about 10kloc contributed and worked on tooling and build, but still have a lot to learn myself.
I watch a lot of these sorts of projects on youtube, my big takeaway is that I probably should learn how to use Ghidra.